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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.orchestra.lib;
21  
22  import java.io.IOException;
23  
24  import javax.servlet.Filter;
25  import javax.servlet.FilterChain;
26  import javax.servlet.FilterConfig;
27  import javax.servlet.ServletException;
28  import javax.servlet.ServletRequest;
29  import javax.servlet.ServletResponse;
30  
31  /**
32   * Compose two filter objects together, as if filter2 is nested within filter1.
33   */
34  public abstract class CompoundFilter implements Filter
35  {
36      private final Filter filter1;
37      private final Filter filter2;
38  
39      public CompoundFilter(Filter filter1, Filter filter2)
40      {
41          this.filter1 = filter1;
42          this.filter2 = filter2;
43      }
44  
45      public void init(FilterConfig filterConfig) throws ServletException
46      {
47          filter1.init(filterConfig);
48          filter2.init(filterConfig);
49      }
50  
51      public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
52          final FilterChain filterChain) throws IOException, ServletException
53      {
54          FilterChain chain = new FilterChain()
55          {
56              public void doFilter(ServletRequest req, ServletResponse rsp) throws IOException, ServletException
57              {
58                  filter2.doFilter(req, rsp, filterChain);
59              }
60              
61          };
62          
63          filter1.doFilter(servletRequest, servletResponse, chain);
64      }
65  
66      public void destroy()
67      {
68          filter2.destroy();
69          filter1.destroy();
70      }
71  }